5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov commit 46e85af0cc53f35584e00bb5db7db6893d0e16e5 upstream. On shutdown the driver core calls the bus' shutdown callback also for unbound devices. A driver's shutdown callback however is only called for devices bound to this driver. Commit 9c30921fe799 ("driver core: platform: use bus_type functions") changed the platform bus from driver callbacks to bus callbacks, so the shutdown function must be prepared to be called without a driver. Add the corresponding check in the shutdown function. Fixes: 9c30921fe799 ("driver core: platform: use bus_type functions") Tested-by: Guenter Roeck Reviewed-by: Uwe Kleine-König Signed-off-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20201212235533.247537-1-dmitry.baryshkov@linaro.org Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1321,9 +1321,13 @@ static int platform_remove(struct device static void platform_shutdown(struct device *_dev) { - struct platform_driver *drv = to_platform_driver(_dev->driver); struct platform_device *dev = to_platform_device(_dev); + struct platform_driver *drv; + if (!_dev->driver) + return; + + drv = to_platform_driver(_dev->driver); if (drv->shutdown) drv->shutdown(dev); }